Clear Straight Sided Wide-Mouth Jars are ideal for applications requiring low profile and easy access to what's inside. Includes Black Phenolic Cap with Pulp & Vinyl Liner. These black caps will give your product the custom look you are looking for. The cap has fine ribbing that provides the grip needed to open the container, even with wet hands. Includes a liner with polyvinyl coating and pulp backing. Phenolic caps are for use with contents that are non-reactive to polyethylene.